diff mbox series

[v2,08/16] memory: Disallow resizing to 0

Message ID 20200212133601.10555-9-david@redhat.com (mailing list archive)
State New, archived
Headers show
Series Ram blocks with resizable anonymous allocations under POSIX | expand

Commit Message

David Hildenbrand Feb. 12, 2020, 1:35 p.m. UTC 
Memory regions / qemu ramblocks always have to have a size > 0.
Especially, otherwise, ramblock_ptr() will bail out with an assert.
Enforce this.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 exec.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/exec.c b/exec.c
index 5bc9b231c4..161e40e16e 100644
--- a/exec.c
+++ b/exec.c
@@ -2160,6 +2160,11 @@  int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp)
         return 0;
     }
 
+    if (!newsize) {
+        error_setg_errno(errp, EINVAL, "Length cannot be 0: %s", block->idstr);
+        return -EINVAL;
+    }
+
     if (!qemu_ram_is_resizable(block)) {
         error_setg_errno(errp, EINVAL,
                          "Length mismatch: %s: 0x" RAM_ADDR_FMT